"Before the Rooster Crows"

“Listen, listen,” he said, “the cock won’t crow till you’ve betrayed me three times,” and that’s the way it was, of course — Peter sitting out there in the high priest’s courtyard keeping warm by the fire while, inside, the ghastly interrogation was in process, and then the girl coming up to ask him three times if he wasn’t one of them and his replying each time that he didn’t know what in God’s name she was talking about. And then the old cock’s wattles trembling scarlet as up over the horizon it squawked the rising sun, and the tears running down Peter’s face like rain down a rock.
— Frederick Buechner

(The recording of this sermon might be a bit quiet, depending on what device you're using to listen to it.)